It will take about not minutes not hours not days even not moths but years it will take to get to space 4 or 5 years.
123.40351046845905 Earth years.
It takes about 50 years from earth to Pluto
Mercury's orbit of the sun take 88 Earth days so 0.24 Earth years
1
29.45 Earth Years
50 Earth Years and 1059 alien years.
lots
It takes 29.5 Earth Years
165 Earth Years
ANSWER:The light year is based upon Earth years. It would be 10 years. It would take the light 5 years to get to the mirror, and 5 years to travel back. ---So if we doing it today, we will see trough that mirror over 10 years the planet as today.
1, it's why we have years
10000 years